On 14 September 2015 the two detectors of the Laser Interferometer Gravitational-Wave Observatory (LIGO) made the first direct detection of Gravitational Waves generated by a binary coalescing system [1]}.
The detection of GWs, aside from demonstrating the existence of binary stellar-mass coalescing black hole systems, has opened the possibility to test General Relativity (GR) in the strong field regime.
Gravitational radiation is not only a prediction of Einstein's theory but also a crucial tool that allows us to study peculiar features of gravity.
